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Wireless sensor networks (WSNs) have attracted high interest over
the last few decades in the wireless and mobile computing research
community. Applications of WSNs are numerous and growing, including
indoor deployment scenarios in the home and office to outdoor
deployment in an adversary's territory in a tactical background.
However, due to their distributed nature and deployment in remote
areas, these networks are vulnerable to numerous security threats
that can adversely affect their performance. This problem is more
critical if the network is deployed for some mission-critical
applications, such as in a tactical battlefield. Random failure of
nodes is also very likely in real-life deployment scenarios. Due to
resource constraints in the sensor nodes, a traditional security
mechanism with high overhead of computation and communication is
not feasible in WSNs. Design and implementation of secure WSNs is,
therefore, a particularly challenging task. This book covers a
comprehensive discussion on state-of-the-art security technologies
for WSNs. It identifies various possible attacks at different
layers of the communication protocol stack in a typical WSN and
presents their possible countermeasures. A brief discussion on the
future direction of research in WSN security is also included.
Securing data is crucial in a world where attackers will attempt to
gain access to personal and business information that, for privacy
reasons, we want to protect. Network topology can be used by an
adversary to undermine a network. To protect this information,
access to the data can be restricted. Sanitization, on the other
hand, of the network topology information explores methods to mask
the data in such a way to hide the network's characteristics while
still providing an analyst data on which she can run statistics.
There exists a tenuous balance between the need for privacy of the
unsanitized network data and the accuracy of the analysis on the
sanitized data.
Supra-molecular chemistry, conceptually founded as a research field
in its own in the 1960s is a rapidly growing field at the
borderline of several disciplines such as bio(organic) chemistry,
material sciences and certainly the classical chemistry topics,
i.e. (in) organic and physical chemistry. Selective binding of ions
is an important area of supra-molecular chemistry research in terms
of ion detection, transport and sensing. Currently, there is a
surge of interest in the development of tailor-made sensor
molecules, able to act as chromogenic sensors for a specific
analyte as colorimetric sensors are simple-to-use diagnostic tools
for sensing purposes that allow 'naked eye' detection of ions
without resort to any spectroscopic instrumentation. In this book,
the detailed photophysical studies of anthracene-9,10-diones
bearing electron-rich coordinating sites at 1 / 1,8 or 1,4
positions for metal ions through color change have been elaborated.
Also, the paradigm shift from selective to differential receptors
has been used for single molecular receptor based simultaneous
analysis of multiple analytes.
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